Its great to see Serbian locale and keyboard are translated, would love to help maybe better translation of some termsand translating other software.

Since ATO Serbia is long gone, are there any instructions how-to for dummies?

P.S.Since Serbian, Bosnia and Croatian are similar to dialects level, people that speak Bosnian and Serbianare most welcome, we can do separate translations of different locales and then just a bit adopt it to our language.